Supratherapeutic International Normalized Ratio in a Patient on Warfarin Following Initiation of Brexpiprazole Pharmacotherapy: A Case Report.

Many medications have established interactions with warfarin, potentially affecting international normalized ratio (INR) levels and increasing the risk of bleeding complications. We present the case of a 74-year-old female inpatient with late-onset schizophrenia who was initiated on brexpiprazole while concurrently receiving warfarin therapy for a ventricular thrombus. Despite INR levels being within a range of 1.